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- Question
As water is cooled from 4 deg C to 0 deg C, its density
Options- A. decreases
- B. increases
- C. remains same
- D. zero
- Correct Answer
- decreases
ExplanationWhen water is cooled from 4°C to 0°C, its density decreases.
When water cools from 4°C to 0°C, ice crystals begin to form because the water is approaching its freezing point. When water freezes, the water molecules form a lattice that increases the volume. As a result, the density decreases. This is why ice will float on top of water; ice has a lower density than the water.
- 1. When was the first elevator built?
Options- A. 1743
- B. 1739
- C. 1760
- D. 1785 Discuss
- 2. The hardest form of carbon is
Options- A. coke
- B. graphite
- C. diamond
- D. charcoal Discuss
- 3. The mica belt of the Himalayas, the major part of it is situated in
Options- A. Andhra Pradesh
- B. Bihar
- C. Rajasthan
- D. West Bengal Discuss
- 4. The first 'Financial Service Park' for industry being set up at
Options- A. Guragaon
- B. Surat
- C. Bangalore
- D. Pune Discuss
- 5. http://www.CuriousTab.com - is an example of what?
Options- A. A URL
- B. An access code
- C. A directory
- D. A server Discuss
- 6. First human heart transplant operation conducted by Dr. Christiaan Barnard on Louis Washkansky, was conducted in
Options- A. 1967
- B. 1968
- C. 1958
- D. 1922 Discuss
- 7. The working language(s) of the UNESCO is/are
Options- A. French only
- B. English only
- C. English and French
- D. English, French and Russian Discuss
- 8. Ralph Samuelson was only 18 when he invented this sporting item in 1922. What was that?
Options- A. Golf tee
- B. Motorboat
- C. Water skis
- D. Hang glider Discuss
- 9. Rahul Dravid also made Test debut along with Sourav Ganguly in the same match.He scored 95 runs. How many fours did he hit in that innings of 95 runs?
Options- A. 6
- B. 10
- C. 5
- D. 7 Discuss
- 10. The smallest glaciers are
Options- A. mountain or alpine glaciers
- B. continental glaciers
- C. piedmont glaciers
- D. None of the above Discuss
More questions
Correct Answer: 1743
Explanation:
The first elevator was built in the palace of King Louis XV. It only traveled up one floor, and was hand powered by men inside the chimney.
Correct Answer: diamond
Correct Answer: Bihar
Correct Answer: Guragaon
Correct Answer: A URL
Explanation:
A URL (Uniform {or Universal} Resource Locator) is an address for a specific document found on the Web. It is made up of several components: a domain name, the directories and subdirectories of the site, and the extension. To learn about these parts of a URL, visit the Evaluating Web Sites tutorial.
Correct Answer: 1967
Explanation:
Louis Washkansky (1913 - 21 December 1967) was the recipient of the world's first human heart transplant.
Washkansky died of double pneumonia eighteen days after the transplant because of a weakened immune system.
Correct Answer: English and French
Correct Answer: Water skis
Explanation:
The new item was first used on Lake Pepin in Minnesota.
Correct Answer: 6
Explanation:
The match was drawn.
Correct Answer: mountain or alpine glaciers
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